21157995

素因数分解:

$3^1\times 5^1\times {\mathrm{181}}^1\times {\mathrm{7793}}^1$

素因数の和:7982

約数の個数: 16

約数和(自身を含む): 34044192

約数和(自身を除く): 12886197

約数列:

[1, 3, 5, 15, 181, 543, 905, 2715, 7793, 23379, 38965, 116895, 1410533, 4231599, 7052665, 21157995]

約数ペア:

[(1, 21157995), (3, 7052665), (5, 4231599), (15, 1410533), (181, 116895), (543, 38965), (905, 23379), (2715, 7793)]